Henry hopkinson



(Model.)

H. HOPKINSON. INJEGTOR.

N0. 489,812.v Patented Jan. 10, 1893.`

' N [www M MW y UETTED STATES EEToE.,

PATENT` lNJECTOR.

SPECIFICATION forming part of Letters Patent No. 489,812, dated January 10, 1893i.

Application filed June 2'7, 1892. Serial No. 438,188. (Model.)

To if/ZZ whom t may concern.-

Beit known that I, HENRY HOPKINSON, iron merchant and brass-founder, a subject of the Queen of Great Britain, and a resident of Nottingham,England,have invented certain new and useiulImprovementsinInj ectors,of which the following is a specification, reference being had to the accompanying drawings.

Figure l shows a longitudinal sectional view of a liquid injector which may be worked by steam direct from a boiler. Fig. lA is a transverse section of the suction cone through its inlet oriiices. Fig. 1B is a plan of the slotted two-armed nut. Fig. lC is an elevation ofthe inlet cone, the suction cone and the force cone removed from the outer casing. Fig. 1D is a View of a valve plate.

I construct each injector with an outer case A forming their interior chambers A A2 A3. The chamber A is supplied with liquid through an inlet cock l leading from a well or reservoir. The chamber A2 has a screw threaded outlet orifice 2 which may be provided with a length of pipe to lead the overflow liquid where required. The chamber A3 surrounds the lower portion of a delivery cone E and is provided with an outlet 3 through which the liquid maybe injected; Bis an inlet cone supplied with steam direct from a boiler; C is a suction cone the upper end of which is circular and tightly'ts into the upper flange of the chamber A of the outer case. The lower part of the circular portion is of larger diameter than the upper end and tightly lits the interior flange of the case forming the division between the chambers A and A2. The circular portion within the chamber A is partly cutaway at opposite sides to form two inlet orifices C shown in cross section at Fig. lA and in side View at Fig. lC through which liquid is admitted. The upper end of the circular portion is screw-threaded interiorly to allow of the adjustment of the inlet cone B within it. D is a force cone. E a delivery cone and F a two armed nut provided with a slotted bridle F shown in plan at Fig. 13 which engages with a groove near the lower end of the delivery cone E. By means of the nut F the cones C D and E may be adjusted to the position shown at Fig. l or they may be withdrawn for examination without having to remove the outer case of theinjector. AcircularchamberGsurrounds the adjacent ends of the suction and force cones C and D and a portion of this chamber is cnt away at opposite sides as shown at Fig. l to form overfiow outlets G each closed by a Valve plate G2.

Fig. 1C shows a side View of the circular portion of the cone C with its inlet orifices C the chamber G with its overflow outlets G and the cones B, C and D in their relative positions and Fig. 1D shows an outer View of one of the valve plates G2.

I-I is a chamber provided with perfolrations I-I between the cones D and E for further relieving the cones C andD of liquid. The exterior of the chamber II is langed at its lower end and tightly fits the interior flange of the case forming the division between the chambers A2 and A3.

The action of the injector is as follows:- The liquid cock lis opened, then steam is turned on passing through the cone B into and through the cones C and D. As it passes from the cone C to D it ills the surrounding chamber G and lifts the valve plate or plates G2 and passes through the outlet or outlets G into the chamber A2 of the outer case A escaping through the outlet orifice 2. A portion of the steam also escapes through the perforations H in the chamber I-I. The rush of steam produces a vacuum in the chamber A causing it to be iilled with liquid through the cock l the liquid being forced by the jet of steam through the cones C and D to and through the delivery cone E into the chamber A3- and out to where required through the outlet 3. As the liquid is forced by the steam jet through the cone C it forms a vacuum in the chambers G and Il causing the valve plate or plates G2 to close and air to rush into the chamber H through the perforations H.

By arranging the parts as above described an injector is produced which if stopped by concussion or an impediment in the delivery pipe if steam is kept on will automatically restart itself upon the impediment being removed.

I am aware that a variety of injectors containing cones similar to those marked B, C, D and E2 and valve plates, have been used IOO 1o O, D, E, of the two-arrned nut F having the slotted bridle F engaged With the delivery cone E, whereby said cones can be adjusted or Withdrawn Without disturbing the outer casing, substantially as described.

In witness whereof I have hereunto set my x5 hand this 14th day of June, 1892.

`HENRY HOPKINSON. Witnesses:

H. W. GOUGH, JOHN HENRY GOUGH. 

